The Coast Guard has been searching a huge 200-mile area in treacherous weather conditions for Tyler Barnett.

the North claimed it had perfected re-entry technology.also assessed that the missile could have had a range of more than 13.

according to defense analysts.the North would have to show a warhead mounted on a ballistic missile exploding in the air after returning to the Earths atmosphere.according to the Norths state-run Korea Central News Agency.

said the fact the North has used lofted trajectories in its ICBM tests should be considered.saying the test finally verified all technical features of the payload of the rocket during its atmospheric re-entry including the heat-resistant features and structural safety of the warhead shroud made of a newly developed carbon compound material.

adding that the North will have to resolve such technical problem to complete its nuclear arsenal.

Re-entry technology is needed to protect a nuclear warhead so it can withstand the extreme heat and other challenges when re-entering the Earths atmosphere from space.told NBC News that she and 13 other relatives were also on the cruise.

According to the cruise lineswebsite.The Coast Guard was utilizing an HC-144 Ocean Sentry aircrew and an MH-60 Jayhawk helicopter aircrew in their search for the missing man before suspending their search at about 9 p.

but his bed was never slept in.The Coast Guard has been searching a huge 200-mile area in treacherous weather conditions for Tyler Barnett.